Daikin Sensira Series, Service Manual

Page: 111 / 172

2 | Components
Service manual
111
FTXF20~71A + FTXF20~25B + FTXF20~42C + ATXF20~71A + ATXF20~42C
+ RXF20~71A + RXF20~60B + RXF20~42C + ARXF20~71A + ARXF20~42C
Split Sensira R32
ESIE18-12E – 2021.02
e Switch box
2 Route the connectors of the indoor unit fan motor, swing flap motor and
swing raster motor (if equipped) inside the switch box and connect them to
the indoor unit PCB.
3 Install and tighten the screw to secure the switch box.
4 Install the heat exchanger thermistor in its holder.
5 Connect the grounding wires to the heat exchanger using the screws.
6 Connect the power supply wiring to the power supply terminal X1M.
To re-install the front grille
1 Install the front grille and firmly engage the 3 upper hooks.
2 Install 2 screws (class 20~42) or 3 screws (class 50~71) back on the front grille.
3 Install the air filter and then mount the front panel.
2.11 Reactor
2.11.1 Checking procedures
To perform an electrical check of the reactor
Prerequisite: Stop the unit operation via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.
1 Remove the required plate work, see "2.10 Plate work" [
4
101].
DANGER: RISK OF ELECTROCUTION
Wait for at least 10 minutes after the circuit breaker has been turned OFF, to be sure
the rectifier voltage is below 10 V DC before proceeding.
2 Visually check the reactor for any damage or burnt‑out components. If any
damage is found, replace the reactor, see
"2.11.2 Repair procedures" [
4
114].
Class 20~42 units
1 Check the connections of the reactor on the main PCB and check continuity of
the wires, see
"5.2 Wiring diagram" [
4
142].
2 Remove the Faston connectors from the reactor.
a
a Reactor
3 Using a megger device of 500 V DC, check the insulation resistance. Make sure
there is no earth leakage.